Re: [RFT] remove skb_linearize from igmp.c

["David S. Miller" <davem@xxxxxxxxxx>]

   From: Stephen Hemminger <shemminger@xxxxxxxx>
   Date: Mon, 23 Jun 2003 12:03:42 -0700

   Could someone who actually receives IGMP packets test this?
   
Don't bother, your patch is buggy.

        int len = skb->len;
 ...
   +    if (!pskb_may_pull(skb, sizeof(struct igmphdr)))
   +            goto drop;
   +    
   +    ih = skb->h.igmph;
   +    if (ip_compute_csum((void *)ih, len)) 
   +            goto drop;

You're only verifying that "sizeof(struct igmphdr)" is available at
skb->data, then you dereference "len" bytes via the call to
ip_compute_csum().